Peppermint soothes the gastrointestinal tract by relaxing the muscles in the intestinal wall. Additionally, by increasing the flow of saliva in the mouth, it encourages swallowing and thus improves the appetite. Peppermint is also useful in reducing or eliminating muscle spasms associated with endoscopy, colonoscopy and barium enemas.

When used as a tea, the antibacterial properties of peppermint aid in relieving respiratory conditions like colds and infections in the lungs.